monitor with ethernet

I just purchased a 2012 13" MBP to replace a Fujitsu tablet computer. While the Fujitsu overall is a POS, and I can't wait to never use it again, its only bright side was the inclusion of a desk dock with USB, ethernet, power, and monitor connections. I'm trying to come up with the best replacement for this dock so I can minimize what I have to plug and unplug from my MPB. It seems like a new monitor might be the best way to go.

I'd like a 24" or 27" monitor. Unfortunately, I am reliant on wired internet in my dorm room. Does anybody know of any monitors other than the Apple Thunderbolt display that have an ethernet port? I would love to purchase this display, since it seems like a great option, but a $1000 monitor does seem a little excessive.

On the 24" side, I'm looking at the Dell Ultrasharp monitors. Is the only difference between the 2412M ($300) and 2410 ($550) the HDMI connection?

Thanks!